Quote:
Originally Posted by Aeroguy
I would think you could stamp the scallops into it. I don't know why you'd use corrugated metal instead of sheet metal.
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The corrugated metal image was just one of many examples or variants within the same conceptual family.
Testing flat sheets with waves, wavy sheets with waves, and more complex 3D shapes similar to the big black whale foil and orange blade are all game.
There is no one design favored over another without objective testing for proof of concept.
There must be a million designs which could be generated based on the same principals, best not to grow a predetermined bias,
let the wind tunnel do that for you.
Aerodynamics by George Kachadoorian | Photobucket
A 3D printer or CNC milling machine opens up a world of possibilities as long as you have the power of human imagination on your side.
If you don't have these tools and the computer programs which go with them, then good old fashion plasticine modeling clay or a soft workable wood can be used. I'm not a big fan of sanding foam, the static cling and mess is not missed.
EDIT: Tested in real life and works as intended, flat sheet with curl at end, curled end cut with waves in it.
George Kachadoorian's Library | Photobucket
Use what you have on hand.
I've used this same process of experimenting with loudspeakers, had some fun with whizzer designs to extend the high end frequency response of a driver. I just used my ears as a measuring device, more accurate than a microphone and computer program in my opinion. The human ear is an amazing instrument once trained.
Can you turn a woofer into a full range driver?
http://www.diyaudio.com/forums/full-...-driver-2.html
I found that I could extend the frequency, but at the expense of lowering dynamic response. In other words, the whizzer mass slowed down the speaker and made it lazy sounding.
However I considered it a good learning experience.
Best thing I found was actually stiffening the dust cap with tiny glass beads glued to it. Not the diamond dust encrusted tweeter of the big guys (
a real thing, not the Frank Zappa song), but pretty darn close considering the low tech involved.